Is washing sheep good or bad?

Not so good. Chongyang originated from the theory of "Six Reds" in China's Book of Changes, namely, Woods Chong, Ugly Buchong, Shen Yinchong, You Mao Chong, Chen Xuchong and Hai Si Chong. This is a term in the "yellow calendar", which means that on this day, people who do things ("appropriate" things in the yellow calendar) will have conflicts with their sheep-that is, when they meet, things will not go smoothly.